Siskiyou County, CA Fire Regulations: Smoke Detectors (2026)

Smoke and carbon monoxide alarm requirements for homes in unincorporated Siskiyou County are set primarily by California state law rather than a separate county ordinance. California Health & Safety Code Section 13113.7 requires smoke alarms approved and listed by the State Fire Marshal to be installed, per the manufacturer's instructions, in every dwelling intended for human occupancy — including single-family homes, duplexes, apartments, condominiums, and factory-built housing. Alarms must be placed in each sleeping room, in the hallway or area adjacent to sleeping rooms, on every story of the dwelling, and in basements. Battery-powered smoke alarms newly installed must contain a non-replaceable 10-year battery. California law also requires carbon monoxide alarms in dwellings that have a fuel-burning appliance, fireplace, or an attached garage; CO alarms must be placed outside each sleeping area and on each level. New construction and remodels are subject to the California Residential Code and California Building Code, which Siskiyou County has adopted (the 2025 Title 24 editions took effect January 1, 2026). Landlords must ensure rental units comply, and alarms must be tested and maintained in working order.